Parasite

How a shortage of factory-bred flies left the US exposed to the flesh-eating screwworm

Short on flies, the administration of US President Donald Trump closed the border with Mexico to cattle imports for more than 15 months starting in May 2025.

A worker handles a tray with Mediterranean fruit flies inside a bio-factory as Mexico's government reconditions a plant to become the new sterile screwworm fly facility, October 17, 2025
The logo of US supplier Taylor Farms at the company's installations following the temporary closure announced by Taylor Farms, in Doctor Mora, Guanajuato state, Mexico, July 24, 2026.

Taylor Farms recalls salsa, guacamole over salmonella risk, weeks after cyclosporiasis concerns